McKee/Staten Island Tech clicked on all cylinders Thursday in a 25-17, 25-10 sweep of visiting No. 10 Midwood and earned a berth in the PSAL city quarterfinals Saturday.

The No. 7 Sea Gulls (12-0 overall) remained the lone Island team in the playoffs after No. 9 Susan Wagner dropped a 2-1 decision to No. 8 Hunter College HS Thursday. The Sea Gulls meet second-seeded Bronx Science at York College tomorrow at 3:30.

“It went very smooth,” said MSIT coach Dave Mahon, who has led the Sea Gulls to the playoffs 19 straight times in his 20 years as head coach. “Everybody contributed. Sometimes we come out slow at the start, but they cleaned it up in the second.”

The Sea Gulls were on even terms with the Hornets midway in the first, but MSIT’s Stephen Leong (11 points, 10 assists, 6 digs, ace) had a steady hand in serving six straight. In between, he fed hitters Yo Sep Bak (nine kills, three digs) and Sibi Selvarajah (11 assists, 5 digs, 4 kills, 3 points) as the Sea Gulls turned a tie at 11 into a 17-12 lead.

When it was Selvarajah’s turn to set, he fed Sergey Zhuravlev (three kills, block) and Paul Sumoul (six kills, two blocks, dig), then took an assist from Leong and dropped a tip on the Hornets’ open floor for a 20-13 advantage.

By the time Sumoul went up for a solo block, the Sea Gulls owned a 22-13 lead.

“We got a lot of new kids stepping up,” added Mahon, who also received contributions from Marcos Saavedra (five digs, point) and Austen Rerick (four digs, three points). “For some of them, it’s their second time in a playoff game. We have guys playing different roles than they did last year.”

MSIT made quick work of Midwood in the second as Calvin Liu (16 points) rattled off for 12 straight to give the Sea Gulls a commanding 15-5 advantage. Kills from Zhuravlev and Bak, and Sumoul’s two kills and another solo block, meanwhile, handled the offense during that run.

Selvarajah took a feed from Leong then et to Bak, who dropped a nice rocket down the middle to wrap up a 22-10 lead for the Sea Gulls.